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Shredding algorithms
Using Delete Files Permanently you can choose to shred files using any of the built-in shredding algorithms or you can create your own shredding algorithm or create shredding algorithms based on the built-in algorithms to be certain that your confidential files, data and information are totally erased.
The program allows you to add new shredding algorithms and view and edit existing ones - you can set the number of shredding passes and byte patterns used in every pass.
Shredding algorithms:
- Fast (1 pass)
The fastest shredding algorithm. Your data is overwritten with zeroes.
- British HMG IS5 (Baseline) (1 pass)
Your data is overwritten with zeroes (with verification).
- Russian GOST P50739-95 (2 passes)
GOST P50739-95 shredding algorithm calls for a single pass of zeroes followed by a single pass of a random byte.
- British HMG IS5 (Enhanced) (3 passes)
British HMG IS5 (Enhanced) is a three pass overwriting algorithm: first pass - with zeroes, second pass - with ones and the last pass with random bytes (the last pass is verified).
- US Army AR380-19 (3 passes)
AR380-19 is a file shredding algorithm specified and published by the U.S. Army. AR380-19 is a three pass overwriting algorithm: first pass - with random bytes, second and third passes with certain bytes and with their compliments (with the last pass verification) .
- US Department of Defense DoD 5220.22-M (3 passes)
DoD 5220.22-M is a three pass shredding algorithm: first pass - with zeroes, second pass - with ones and the last pass with random bytes. With all passes verification.
- the US Department of Defense DoD 5220.22-M (E) (3 passes)
DoD 5220.22-M (E) is a three pass shredding algorithm: first pass - with certain bytes, second pass - with a complement and the last pass - with random bytes.
- NAVSO P-5239-26 (RLL)
NAVSO P-5239-26 (RLL) is a three pass overwriting algorithm with the last pass verification.
- NAVSO P-5239-26 (MFM)
NAVSO P-5239-26 (MFM) is a three pass overwriting algorithm with the last pass verification.
- the US Department of Defense DoD 5220.22-M(ECE) (7 passes)
DoD 5220.22-M(ECE) is a seven pass overwriting algorithm: first and second passes - with certain bytes and with their compliment, then two passes with a random character, then two passes with a character and its complement and the last pass - with a random character.
- Canadian RCMP TSSIT OPS-II (7 passes)
RCMP TSSIT OPS-II is a seven pass overwriting algorithm with three alternating patterns of zeroes and ones and the last pass - with a random character (with the last pass verification).
- German VSITR (7 passes)
The German standard calls for each sector to be overwritten with three alternating patterns of zeroes and ones and in the last pass with a character.
- Bruce Schneier (7 passes)
The Bruce Schneier shredding algorithm has seven passes: first pass - with ones, the second pass - with zeroes and then five times with random characters.
- Peter Gutmann (35 passes)
Peter Gutmann shredding algorithm has 35 passes.
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